Wilton, who was born in Cringleford, Norfolk, was the son of a British mining engineer employed in Russia. In 1889 he joined the European staff of the New York Herald, remaining with that newspaper for fourteen years, and corresponding on both Russian and German affairs. He then took up an appointment as The Times correspondent in St Petersburg, and became known as a keen observer of events in Russia during the last years of the Tsarist regime. After the Revolution, he moved to Siberia. Following the collapse of the Kolchak government, Wilton managed to escape from Russia and eventually arrived in Paris where, in 1920, he rejoined the New York Herald. In 1924 he joined the staff of a newly-founded newspaper, the Paris Times (which published in English). He died from cancer at the Hertford British Hospital in Paris early in 1925.
He was the author of two books: Russia's Agony (published by Edward Arnold, London, 1918) and The Last Days of the Romanovs (1920). In The Last Days the British and American publishers did not list the names of the Jewish Bolsheviks, however the French edition did.
Wilton was accused of being a right-wing antisemite. He believed the Bolsheviks were German agents and their revolution was simply a Jewish-German invasion of Russia. He claimed that execution of the Romanovs was an act of ritual murder by the Jews. He was criticized by several liberal British journalists for supporting the attempted military coup by Lavr Kornilov.
- Obituary: Mr R. W.(sic) Wilton. The Times, Tuesday 20th January 1925, p. 14 column D.
- Obituary, The Times.
- Jewish (not Russian) Bolsheviks
- Conservative Party Attitudes to Jews 1900-1950, By Harry Defries, page 75
- A Factual Account of the Massacre of Russia’s Imperial Family 
- "Seasoned British Journalist Names Names in Account of Massacre of Russia's Imperial Family" IHR
- Russia's Agony by Robert Wilton.
- The Last Days of the Romanovs by Robert Wilton, George Gustav Telberg and Nikolai Sokolov.
- Excerpts from Robert Wilton works